The way I do it is
1. Disconnect the connecting rods
2. start to bring the idle down to specs or about 800 RPM by adjusting
each idle screw using a Unisyn or other device but it is not critical at
this point to get everything exact.
3. After idle speed is adjusted reasonably well start playing with the
mixture nuts adjusting them lean or rich to get the highest idle speed
possible. A dwell/tach that you can see from the engine would be nice as
well as a vacuum gauge or either one.
4. Adjust the idle speed once more using a Unisyn to balance the carbs.
5. After adjustments press on the piston lifting rod, lifting the piston
about 1/4" and see if the car stalls (too lean) or the RPMS increase (too
rich). The engine should run, albeit roughly, with the piston rod raised.
6. If you're satisfied, reconnect the connecting rods however loosen the
nuts on each of the connecting rods before reconnecting so you can balance
the high speed running of the carbs. Make sure you don't shorten the rods
too much as they will effect the idle speed. I keep mine long and use the
high speed screw on the manifold to take up the slack.
Remember to adjust the valves before doing this and make sure after you get
the idle speed about right to check the timing as it will affect the idle
speed too.
Hope this helps,
Mike
----- Original Message -----
From: "Robert Keen" <rekeen@mtu.edu>
To: <datsun-roadsters@autox.team.net>
Sent: Friday, June 15, 2001 7:43 PM
Subject: Re: silly idling question
> Hoon Kim-
> It's not a silly question. I've faced the same problem and
> solved it probably incorrectly. I hope the roadster gurus
> take the question seriously.
> --Bob Keen
> 68 1600
> =============================
> On Fri, 15 Jun 2001 10:12:12, Hoon Kim wrote:
> =
> = After working on my car for a while, taking stuff
> = apart and putting stuff back together, my idle is way off.
> =
> = My silly question is:
> =
> = what is the best and simplest way to adjust your idle
> = with so many variables such as the idle crew, the carb
> = mixture adjust screws, and even the throttle cable tension.
> =
> = Thanks again!
> = --
> =
> =
> = Hoon Kim
> = Pixar Animation Studios
> = Emeryville, CA
> = hoon@pixar.com
> ===============================
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